 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.dialogs;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.WorkbenchMessages;
 import org.eclipse.ui.internal.WorkbenchPlugin;
 import org.eclipse.ui.internal.misc.StatusUtil;
 import org.eclipse.ui.internal.preferences.WorkbenchPreferenceExtensionNode;
 import org.eclipse.ui.internal.registry.CategorizedPageRegistryReader;
 import org.eclipse.ui.internal.registry.IWorkbenchRegistryConstants;
 import org.eclipse.ui.statushandlers.StatusManager;

 /**
  * A proxy for a preference page to avoid creation of preference page just to
  * show a node in the preference dialog tree.
  */
 public class WorkbenchPreferenceNode extends WorkbenchPreferenceExtensionNode {

     /**
      * Create a new instance of the receiver.
      * @param nodeId
      * @param element
      */
     public WorkbenchPreferenceNode(String nodeId, IConfigurationElement element) {
         super(nodeId, element);
     }

     /**
      * Creates the preference page this node stands for.
      */
     public void createPage() {
         IWorkbenchPreferencePage page;
         try {
             page = (IWorkbenchPreferencePage) WorkbenchPlugin.createExtension(
                     getConfigurationElement(), IWorkbenchRegistryConstants.ATT_CLASS);
         } catch (CoreException e) {
             // Just inform the user about the error. The details are
 // written to the log by now.
 IStatus errStatus = StatusUtil.newStatus(e.getStatus(), WorkbenchMessages.PreferenceNode_errorMessage);
             StatusManager.getManager().handle(errStatus, StatusManager.SHOW);
             page = new ErrorPreferencePage();
         }

         page.init(PlatformUI.getWorkbench());
         if (getLabelImage() != null) {
             page.setImageDescriptor(getImageDescriptor());
         }
         page.setTitle(getLabelText());
         setPage(page);
     }

     /**
      * Return the category name for the node.
      * @return java.lang.String
      */
     public String getCategory() {
         return getConfigurationElement().getAttribute(
                 CategorizedPageRegistryReader.ATT_CATEGORY);
     }
 }

